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E. D. SMITH.

SWITCH LOCK. APPYLICAUON FILED.OCT. 9,1914.

1,195,619. Pmeualug. 22,1916.

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EDWIN D.-s1vIIT1I, or sT. LOUIS, MISSOURI.

SWITCH-LOCK.

To all whom t may concern:

Beit known that I, EDWIN D. SMITH, a citizen of the United States, residingat the city of St. Louis andState of Missouri, have invented a new and useful Switch-Lock, of which the following is a speciication.

This invention' relatesto switch locks for controlling electrical circuits, and it consists of the novel construction, combinationV and arrangement ofl parts 'whereby a key'. and tumbler lock is combined with a switch in such a manner that the switch may be locked in position toopen or to close one or more circuits, with provision for enabling the movement of the key to be reversed and turned to the starting point and withdrawn without disturbing the locked adjustment of the switch whether the circuit be open or closed.

An object of the invention is to combine a lock of the tumbler type with an electrical Switch, with provision whereby the lock may be operated in one direction to open or to close the switch, and with a further 'provision that the actuating key of the lock'may be turned backwardly or reversed to the starting point and withdrawn without disturbing the locked position of the switch, the switch being thus locked in opened or closed adjustment. j

Another objectv is to provide a key actuated lock of the tumbler type, in combination with an electrical switch, with intermediate devices whereby actuation of the lock in one direction will operatel the switch to open or to closed position or adjustment,y

and in which the operation of the lock may be reversed to the starting point to enable the key to be withdrawn without disturbing the adjustment of the switch, so that the switch may be locked in any desired adjustment and the key withdrawn therefrom.

With the foregoing and other objects in view I have produced my invention in a suitable embodiment, one form of which is illustratedl inthe `accompanying drawings in which g Figure 1 is a'sectionalview ofthe invention. Fig. 2 isa side elevation. Fig. 3 isa lsectional view on the line 3 3 of Figl 1. Fig; 4 is a sectional view onthe line 4 4 of Fig. 1. Fig. `5 is a sectional view on the line 5 5 of Fig.' 1.

` In the embodiment illustrated the support l is of suitable insulating material, such as Specification of Letters Patent.

Patented Aug. 22, 1916.

Application filed October 9, 1914. Serial N o. 865,812.

porcelain or the like, and supports a number of members 2 constituting the terminals of the circuit wires 3. The type of terminal support illustrated is adapted particularly for usain switch-boards in which circuits of different potential are controlled by a single switch. Thus it will be understood that my invention is adapted for use with equal'advantage underfvarious conditions and with various kinds of switches.

rod 4 has one'endjournaled in a bearingformed in a block 5 secured within a. recess in `the support l. A spring 6 encircles the' rod 4, and has one end in engagement with a flange 7 rigid with said rod, and the other end in connection with the controlling devices (not shown) of the terminal connecting members 8. The controlling devices of the terminal connecting members 8`are well known in the art, and do not constitute any part of the present invention, so that it is not necessary to illustrate or describe them in detail. It is sufli cient to understand that when the rod 7 is turned in a direction to tension the spring '6,the power of said spring is exerted upon the devices which control the connecting members 8, and at a time determined by the construction of said devices the controlling devices are released and snapped by the spring from one position to another. The position to which the lconnecting members are movedv may be from a position in which one circuit is opened to a position in which `the same circuit is closed, or vice versa; or from a position in which one circuit is closed to a position closing another circuit. Thus, it will be understood that the switch may be of any desired construction, and may be one in which the connecting members included in the same switch control circuits of diferent potential. j

The end of the rod 4 is received in an Vopening in the end ofanadjacent rod 9 which is supported within the lock case or shell 10. The case or shell 10, in the embodiment Shown, is connected with the support 1 by a bracket 11 having its central portion attached to said support 1 and its extremities attached to the case or shell 10. A plate or disk 12 is attached to the rod 4 adjacent to the extremity of the rod 9, and supports a pivoted pawl `13 engaging with a ratchet 14 which is rigid with the extremity of the rod9. A spring 15 also supported by the plate or disk 12 pressesn the pawl 13 against the ratchet 14. This arrangement enables the rod 9 to turn in one direction without operating the rod 4, but operation of the rod 9 in the opposite direction actuates the rod 4 and thereby actuates the connecting member 8 to open or to close the switch, 0r to change the potential of the circuit by moving from the terminals of one circuit to the terminals of a circuit of different potential. Y

The outer end of the rod 9 is connected to a slotted barrel 15.a whichy is revolubly supported in a body portion 16 .rigidly Vsecured within the case or shell 10. The bar- Vrel is pro-vided4 with a number of wards 17 of normal or star-ting position before the keyV can be inserted. rThe key 20 utilized is of special construction for the particular switch my" invention.

Y a circuit of another potential.

to which it is adapted,being provided on one edge with the usual notches and teeth, the notches being adapted to receive the ends of the wards 17, thereby holding the ends of said wards Hush with the surface or periphery of the barrel 15, and holding the pins 18 out of engagement with said tumbler 15, thereby ypermitting said tumbler to be turned by the key. When the barrel is turned from its normal or starting position it is impossible to remove the key because the wards 17 cannot be pressed outwardly, and it is also impossible to 'operate the switch without the special key, because the barrel is locked against rotation by the pins 18 extending partially into the-barrel, in the well understood manner. l

VVhen it is desired to operate the switch the key 2O is inserted in the barrel in the vusual manner and is turned in a direction to cause the ratchet 14 to actuate the pawl 13 and thereby turn the rod 4 to actuate the connecting member 8 through coperation with the usual controlling devices (not shown), found in theV switches well known commercially, with which vI have combined Thus, the switch can be turned or set in any desired position, either .tojopen or to close a circuit, or to change the potential of the circuit from which powerl is taken byv moving the connecting member from a circuit of one potential to e After the switch` has beenl adjusted in the desiredposition, the operation of the tumbler may Vbe reversed, the ratchet 14 moving freely under theA end of the pawl 1S the reversed direc- Y tion, until the barrel arrives `at its starting point. When the barrel arrives at its starting point the key may be withdrawn in the usual manner, and the barrel is thereupon automatically locked by the pins 18, thereby also locking thev switch in theV desired adjustment. Thus, the switch may be locked in position to open or closethe circuit and the key may be withdrawn from the switch whether the circuit bef open or 1closed and, Y

since a special key is required foroperation- Y e' of the.switch,it is obvious that unauthorized operation ofthe switch is impossible. Y

I do not restrict myself to the precise features of arrangement and construction illustrated and described, nor vto the use: of the switch in any particularv embodiment,

nor to the use of the loclingmechanism in e 1. In a device of the character described,

the combination with Amechanism to'be set in operative and inoperative positions, of a revoluble rod operable to actuate said mechanism to lits operative and inoperative positions by movement of'said rod in'one direction, a part connected with said rod and havingan opening therein, a removable device adapted to be engaged v.in said opening to actuate said part and said rod and thereby said mechanism, meansA enabling the movement `of said rod to be reversed for the purpose described `While the.v mechanism remains stationary, and elements preventing operation ofsaid rod by other than said removable device. l p e 2. In a device of the character described, the combination with mechanism settable in diierent positions, of an actuator therefor comprising a revoluble member, a removable device for actuating said member, and means whereby said member will actuate said mechanism when operated in onedirection and will move independently of said mechanism when actuated in the opposite direction. 1

v3. In a device of theucharacterV described, the combination with mechanism to vbeV set in different positions, of an actuator therefor comprising a revoluble member, a key,- means whereby said key may be connected f with or detached from said Vmember ini-the starting position of said member andpreventing removal of-saidkey whensaid member is in other than Vits startingposition,V means whereby s said memberV will actuate said mechanism when said member is turned iso.V

in one direction and will move independently of said mechanism when operated in the'reverse direction to its starting point 'after the mechanism has been set in the desired position.

t. In a device of the character described, the combination with mechanism to be actuated, of a rod for actuating said mechanism, a revoluble actuator for said rod, a removable key for actuating said actuator, and a ratchet and pawl device whereby said movement of said rod in one direction will operate said mechanism.

5. In a device of the character described, the combination with mechanism to be actuated, of an actuator therefor comprising a revoluble member, a removable manually operable device for controlling said member, and a ratchet and pawl device whereby movement of said member in one direction will operate said actuating device and movement of said member in the opposite direction is independent of said actuating device.

6. In a device of the character described,

, the combination with mechanism to be actuated, of an actuator therefor comprising a rod, a second rod, a ratchet and pawl device whereby movement of said second rod in one direction will operate said firstnamed rod and enabling said second rod to move in the opposite direction independently of said first-named rod, a device controlling said second-named rod, an element for actuating said device, and means for positively holding said device from movement by means other than said element.

7. In a device of the character described, the combination with mechanism to be actuated, of an actuator therefor comprising a rod, ratchet 4and pawl devices whereby movement of said rod in one direction will Y operate said actuator leaving said rod free to move in the opposite direction independently of said actuator, mechanismcontrolling said rod, elements holding said mechanism from movement, and a device movable to release said elements and to actuate said rod.

8. In a device of the character described, the combination with mechanism to be actuated, of an actuator therefor comprising a rod, of a pawl supported by said rod, a second rod, a ratchet supported by said second rod and adapted to be engaged by said pawl whereby movement of said second rod in one direction will operate said firstnamed rod leaving said second rod free to move in the opposite direction independent of said first-named rod, a member for operating said second rod, elements holding said member, and a device movable in one direction to release said elements and in another direction to move said member.

9. In a device of the character described, j

the combination with mechanism to be actuated, of an actuator therefor comprising two relatively movable rods for operating said mechanism, a pawl and ratchet device whereby movement of one of said rods in one direction will actuate the other rod and thereby actuate said mechanism, a removable device for actuating said rods in unison or one of said rods independently of the other, and releasable elements controlled by said device preventing operation of `said rods by means other than by Said device.

l0. In a device of the character described, mechanism to be actuated, in combination with actuating mechanism therefor comprising a ro'd for operating said switch mechanism, a pawl supported by said rod, a ratchet engaged by said pawl, means for operating said ratchet eifectively to engage said pawl and rotate said rod, or independently of said pawl and rod as desired, and elements controlled by said means for preventing operation of said ratchet.

1l. In a device of the character described, the combination with mechanism to be actuated to operative and inoperative positions, of a member for actuating said mechanism, provision whereby said member may be operated in one direction to actuate said mechanism to operative or inoperative positions, and in the opposite direction to the starting point independently of said mechanism whereby said mechanism may be placed in any desired adjustment, and means for preventing unauthorized operation of said mechanism from any adjustment in which it is placed.

12. In a device of the character described, the combination with mechanism to be actuated to operative and to inoperative positions, of a member for actuating said mechanism, a removable device for operating said member, provision whereby operation of said device in one direction will operate said mechanism to operative and to inoperative positions, leaving said member free to be operated in the opposite direction to the starting point while the mechanism remainsr in the adjustment in which it was placed by rthe first operation thereof, substantially as described.

In witness whereof, I have signed this specification in the presence of two subscribing witnesses.

EDWIN D. SMITH. Witnesses:

J. C. DEANE, G. B. RANDALL.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

